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Old 10-21-2012, 12:47 AM   #1
coolerthanafan
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Default Reliability .. searched and searched

I have a 2008 STi. I have searched many times over. Will a stage 2 (Cobb) keep my STi reliable? Not looking to race or autocross. Just looking for something that will be 300 hp at the wheels but be reliable. Nothing crazy here. Please, anyone with experience in stage 2, please let me know your feedback.
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Old 10-21-2012, 01:13 AM   #2
dumpstercrusher
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you should be fine if ur not driving it like u stole it everywhere. i ran my vf39 from 18,000 miles to 122k and i jus got it tuned with an ewg thursday. Still runnin strong
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Old 10-21-2012, 12:30 PM   #3
MaddMax
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If you searched, then you'll see constant mention of broken ringlands on the 08+ WRX/STI models. Do some research on the ringland issue and you'll see this issue seems to afflict a lot more Stage II GR (08+ Imprezas) than stock or Stage I cars. The STIs use slightly higher compression pistons and for whatever reason, the reports of busted ringlands on Stage II STIs is significantly higher on those cars than the regular WRX. Many will say it's all in the "tune", but the reality is there have been many Stage II STIs and WRXs, for that matter, than have wrecked the ringlands with perfect tunes. I firmly believe there's a very random hiccup in the fuel delivery system that can momentarily flake out cause a very deadly lean condition.

Buyer beware if you choose to go Stage II. The chances are low something bad will happen, but many cases have been reported on this site and other WRX-based sites and the ringland carnage seems to afflict more Stage II and greater cars than any others.
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Old 10-21-2012, 01:40 PM   #4
lolsmileyfc
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If you want reliability with any psi of boost upgrade your intercooler, water/meth inj etc. You want to also manage your fuel psi with a upgraded fuel pump and a fuel regulator/gauge. NEVER I MEAN NEVER upgrade your intercooler piping to more than 4 inches if your not going to turn the boost up a bit. It will create lots of lag ><

i drove rx7's for almost 4 years having to worry about reliability every time i boosted those spinning triangles.
trust and believe me bro the properly vented intercoolers and regulated fuel pressure will go along way meaning that if you can manage your temps/psi you can drive that ****er like you stole it everywhere you go.

in my opinion there is no point of boosting a lot of power specially if its your dd if it isnt reliable.
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Old 10-21-2012, 03:59 PM   #5
Coreycarlile911
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Ya in my experience stage2 will be just fine, my car has been stage2 for most of its life and now has 107k on it. I would highly recommend a protune tho so its set up specific to your car. After my protune it put 300whp and 325 awtq. So your power goal should be pretty reliable as it has been for me. Also keep up on all maintenance. I think when people dont keep up on maintenance is the reason they have problems
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Old 10-21-2012, 04:04 PM   #6
Decipher
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I've read a lot about ringlands and it's still happening today. It's also still happening on stock cars. The trend I do see is this happening far more in the STI versus the WRX. In my reading, I'm seeing a high occurrence on stock tunes. I can't accurately state it happens more on stage 2 or not. Maybe a poll is in order. My point is this: Go Stage 2 but do it on a conservative tune. Make sure safety is your priority, not power. A tuner can make the proper adjustments for this. If you're using your AP, Cobb tunes leave power on the table, but the trade-off is safety. You're rolling the dice either way, so do what makes you happy but do it correctly.
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Old 10-21-2012, 04:32 PM   #7
04furesterXT
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No tune can compensate for plain ol' abuse. That is why stock cars blow as well as modded cars.
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Old 10-21-2012, 05:53 PM   #8
Decipher
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What's abuse? Driving up to red line? Not in my book. If your maintenance supports it, there shouldn't be a problem with driving your car like that. The engineers build in a level of safety when considering red lines and the such. Subaru has dropped the ball somewhere, especially in the STI.
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Old 10-21-2012, 05:56 PM   #9
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Quote:
Originally Posted by MaddMax View Post
The STIs use slightly higher compression pistons
The STi is lower compression than the WRX. 8.2 vs 8.5
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Old 10-21-2012, 06:00 PM   #10
04furesterXT
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Quote:
Originally Posted by Decipher View Post
What's abuse? Driving up to red line? Not in my book. If your maintenance supports it, there shouldn't be a problem with driving your car like that. The engineers build in a level of safety when considering red lines and the such. Subaru has dropped the ball somewhere, especially in the STI.
Subaru hasn't dropped the ball they just didn't allow for idiots bouncing off the rev limiter and running the car low on oil constantly.
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Old 10-22-2012, 01:02 AM   #11
Coreycarlile911
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Ya the big rave about ringland failure is rediculous. If you look and the amout of cars sold and then look at the amount with failure it would make ya feel better. Only difference is the people with problems get on here and blow um up. If everyone with a car that ran perfectly got on here and posted there car ran perfect no one would even care bout the small percentage of failures. Bottom line is take car of the car. Ya its high performance but there is a difference between driving it the way it was made to drive and beating the crap out of it. If ya cant figure out that difference ya prob shouldnt be driveing your car.
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Old 10-22-2012, 08:02 AM   #12
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Get it tuned by a respected and knowledgeable tuner. Detonation is what kills these engines, not necessarily being driven hard. Off the shelf tunes cannot guarantee safety because every car and the environment it is driven in has slight differences. I would recommend a tuner that does road tunes.
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Old 10-22-2012, 09:50 AM   #13
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Quote:
Originally Posted by MaddMax View Post
I firmly believe there's a very random hiccup in the fuel delivery system that can momentarily flake out cause a very deadly lean condition.
would upgrading the fuel pump at stage 2 remedy this, or at least be some insurance against this possibility?

i just picked up a maddad bellmouth catted DP, and am also concerned with affecting the reliability of my 08 wrx when going stage 2. like the OP, i don't plan to race, just want to up the HP of my daily driver.

i have been reading a lot about how monitoring the IDC is important when upgrading turbos, thus the importance of simultaneously upgrading the fuel pump and injectors... so this has me thinking i should perhaps upgrade my fuel pump before installing my DP.

thoughts?
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Old 10-22-2012, 10:26 AM   #14
be0tch
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I agree with guroove that a good tune is very important. Some people also upgrade injectors and fuel pump when going to a protuned "stage 2+".

What I've always been told is that even with a good tune and all the proper bits and pieces, a bad tank of gas or a single bad boost spike/creep incident and you could be in trouble.

edit: I drove 7500 incident free miles on a stage 2 protune this year and just upgraded to a larger turbo (and lots of other parts) approximately 100 miles ago.
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Old 10-22-2012, 01:36 PM   #15
SouthernWRX
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Quote:
Originally Posted by isotopesope View Post
would upgrading the fuel pump at stage 2 remedy this, or at least be some insurance against this possibility?

i just picked up a maddad bellmouth catted DP, and am also concerned with affecting the reliability of my 08 wrx when going stage 2. like the OP, i don't plan to race, just want to up the HP of my daily driver.

i have been reading a lot about how monitoring the IDC is important when upgrading turbos, thus the importance of simultaneously upgrading the fuel pump and injectors... so this has me thinking i should perhaps upgrade my fuel pump before installing my DP.

thoughts?
From my research and what the local tuner here has told me, is yes you want to upgrade the fuel pump. If you think about it, its but a drop in the hat for some added security. I mean I believe its about $120 for a good fuel pump. I've also heard you may need to add a boost controler, whether its manual or electric. As some have stated and many always say, "talk to your local tuner".

Apparently there is a proper/safe (as safe as it can be, I guess) to do stage 2. From my research its more than downpipe and tune and rag the piss out of the car. There are a bunch little things that should be done when going stage 2 to help insure the safety of your car and wallet. I'm currently in the process of saving and buying in's and out's here and there for stage 2 myself.
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Old 10-22-2012, 04:13 PM   #16
tunertype
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Quote:
Originally Posted by isotopesope View Post
would upgrading the fuel pump at stage 2 remedy this, or at least be some insurance against this possibility?

i just picked up a maddad bellmouth catted DP, and am also concerned with affecting the reliability of my 08 wrx when going stage 2. like the OP, i don't plan to race, just want to up the HP of my daily driver.

i have been reading a lot about how monitoring the IDC is important when upgrading turbos, thus the importance of simultaneously upgrading the fuel pump and injectors... so this has me thinking i should perhaps upgrade my fuel pump before installing my DP.

thoughts?
Fuel pump and injectors would give some insurance. Assuming a good quality tune is done to compensate for the injectors. If your running the injectors at close to max duty cycle there is more of a chance of one going out.

Also boost gauge, wideband and egt gauges always reading so you can monitor your could help to prevent a bad situation(shutdown if see bad readings).
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Old 10-22-2012, 04:51 PM   #17
isotopesope
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Quote:
Originally Posted by SouthernWRX View Post
From my research and what the local tuner here has told me, is yes you want to upgrade the fuel pump. If you think about it, its but a drop in the hat for some added security. I mean I believe its about $120 for a good fuel pump. I've also heard you may need to add a boost controler, whether its manual or electric.
that's been my thinking too. i don't want get overly worked up to throw that pipe on, run a ots map and press go, if i am going to cause myself problems down the road by not installing other helpful or supporting mods. i bought this car to be a reliable replacement to my super modded n/a obs, which was becoming a money pit. i've learned i'm not rich enough to race my daily driver and it put it at risk of breaking down. hahaha

i've been looking at the deatschwerks 265 lph and the walbro 255lph pumps. i eventually want to replace my td04 with a vf52, so a new pump and new injectors will be inevitable.

i bought the DP used from my local tuner, revolutions performance, and got dyno tuning pricing figured out through them. it was good to meet them and get a sense of their shop.
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Old 10-22-2012, 04:58 PM   #18
isotopesope
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Quote:
Originally Posted by tunertype View Post
Also boost gauge, wideband and egt gauges always reading so you can monitor your could help to prevent a bad situation(shutdown if see bad readings).
yeah, i really want a boost gauge, plus an afr too. this pipe has a bung for a wide band o2. what are you looking for with the egt gauge? i suppose the temp would tell me if i am too lean or rich? i haven't done any research on using that gauge yet, obviously. in my mind initially, it seemed like the accessport would be so great to use for monitoring, but the practicality is such a pain in the ass. i don't have a holder, it's annoying having to always plug/unplug it, etc.

ugh, stage 2 seems so far away now. hahahaha
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Old 10-22-2012, 11:10 PM   #19
WaterfordRex
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The issue with the hypereutectic pistons, and a combination of randomly high heat and high pressures. The silicon content in these pistons is not always uniformly dispersed. Anywhere from 12% to 19% silicon could be in each individual piston, resulting in uneven heating, expansion etc.

Monitoring knock feedback is a must. Ensuring the engine has the fuel it needs to prevent premature detonation will definitely keep your engine running longer.

Hope this helps
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